动物营养学报2019，Vol.31Issue(9)：4152-4161,10.DOI:10.3969／j.issn.1006⁃267x.2019.09.027
卵形鲳鲹幼鱼对叶酸的需要量
Dietary Folic Acid Requirement for Juvenile Golden Pompano ( Trachinotus ovatus)
摘要
Abstract
This experiment was conducted to investigate the effects of dietary foilc acid levels on growth per?formance, body composition, serum biochemical and immune indices, liver antioxidant indices and folic acid accumulation of juvenile golden pompano ( Trachinotus ovatus) , and to determine the foilc acid requirement for juvenile golden pompano. A total of 525 healthy juvenile golden pompano with initial body weight of (7.77±0.10) g were selected and randomly divided into 7 groups with 3 replicates per group and 25 fish per replicate. Fish in the 7 groups were fed the experimental diets which contained 0.31 ( control) , 0.94, 1.76, 2.83, 4.20, 5.69 and 6.32 mg／kg folic acid, respectively. The experiment lasted for 8 weeks. The results showed as follows: 1) the weight gain rate and specific growth rate of 4.20 mg／kg group were significantly higher than those of the control group ( P＜0.05) , while the feed conversion ratio was significantly lower than that of the control group ( P＜0.05). 2) The serum total cholesterol content of 1.76 mg／kg group was signifi?cantly lower than that of the control group ( P＜0.05) , and the serum triglyceride content of 5.69 mg／kg group was significantly lower than that of the control group ( P＜0.05). 3) The serum lysozyme activity of 1.76, 2.83, 4.20, 5.69 and 6.32 mg／kg groups was significantly higher than that of the control group ( P＜0.05) , and the contents of complement 3 and complement 4 in serum of 2.83, 4.20, 5.69 and 6.32 mg／kg groups were significantly higher than those of the control group ( P＜0.05). 4) The liver total antioxidant capacity and catalase activity of 0.94, 1.76, 2.83, 4.20, 5.69 and 6.32 mg／kg groups were significantly higher than those of the control group (P＜0.05) , and the liver folic acid accumulation of 0.94, 1.76, 2.83, 4.20, 5.69 and 6.32 mg／kg groups was significantly higher than that of the control group ( P＜0.05). In conclusion, dietary suitable folic acid level can improve the growth performance, enhance the body immunity and antioxidant ca?pacity. Quadratic regression analysis of the weight gain rate and liver folic acid accumulation indicate that the dietary folic acid requirement of juvenile golden pompano is 4.53 and 4.94 mg／kg, respectively.[ Chinese Journal of Animal Nutrition, 2019, 31(9) :4152?4161]关键词
卵形鲳鲹/叶酸/生长性能/肝脏抗氧化能力/需要量Key words
Trachinotus ovatus/folic acid/growth performance/liver antioxidant capacity/requirement分类
农业科技引用本文复制引用
黄倩倩,王芸,林黑着,黄忠,周传朋,虞为,荀鹏伟,杨育凯,黄小林,王珺..卵形鲳鲹幼鱼对叶酸的需要量[J].动物营养学报,2019,31(9):4152-4161,10.基金项目
中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金( 2017ZD01) （ 2017ZD01）
国家自然科学基金(31602175) （31602175）
深圳市战略性新兴产业发展专项资金( SWCYL20150330010013) （ SWCYL20150330010013）
广州市科技计划项目(201707010445) （201707010445）
